OPERATION AND PARTS MANUAL
THIS MANUAL MUST ACCOMPANY THE EQUIPMENT AT ALL TIMES.
MODEL MC12PH
CONCRETE MIXER
(HONDA GX340UT2QA2/GX340UT2QAP2
GASOLINE ENGINES)
Revision #1 (09/02/15)
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Diamond
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Tsurumi, Husquvarna/Target, Whiteman-Concrete/Mortar, Stow-Concrete/Mortar, Baldor,
Wacker, Sakai, Snorkel, Upright, Mi-T-M, Sullair, Neal, Basic, Dynapac, MBW, Weber,
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FUEL AND CHEMICAL EXPOSURE WARNINGS
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Gasoline engine exhaust and some of
its constituents, and some dust created
by power sanding, sawing, grinding,
drillingandotherconstructionactivities
contains chemicals known to the State
of California to cause cancer, birth
defects and other reproductive harm.
Some examples of these chemicals are:
Leadfromlead-basedpaints.
Crystallinesilicafrombricks.
Cementandothermasonryproducts.
Arsenicandchromiumfrom chemically
treatedlumber.
Your risk from these exposures varies,
dependingonhowoftenyoudo this type
of work. To reduce your exposure to
these chemicals: work in aALWAYS
well ventilated area, and work with
approved safety equipment, suchas
dust masks that are specially designed
to filter out microscopic particles.
PAGE 2 — MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15)
SILICOSIS/RESPIRATORY WARNINGS
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WARNING
SILICOSIS WARNING RESPIRATORY HAZARDS
Grinding/cutting/drilling of masonry, concrete, metal and
other materials with silica in their composition may give
off dust or mists containing crystalline silica. Silica is a
basic component of sand, quartz, brick clay, granite and
numerous other minerals and rocks. Repeated and/or
substantial inhalation of airborne crystalline silica can
cause serious or fatal respiratory diseases, including
silicosis.In addition, California and some other
authorities have listed respirable crystalline silica as a
substance known to cause cancer. When cutting such
materials, always follow the respiratory precautions
mentioned above.
WARNING
Grinding/cutting/drilling of masonry, concrete, metal and
other materials can generate dust, mists and fumes
containing chemicals known to cause serious or fatal
injury or illness, such as respiratory disease, cancer,
birth defects or other reproductive harm. If you are
unfamiliar with the risks associated with the particular
process and/or material being cut or the composition of
the tool being used, review the material safety data
sheet and/or consult your employer, the material
manufacturer/supplier, governmental agencies such as
OSHA and NIOSH and other sources on hazardous
materials. California and some other authorities, for
instance, have published lists of substances known to
cause cancer, reproductive toxicity,or other harmful
effects.
Control dust, mist and fumes at the source where
possible. In this regard use good work practices and
follow the recommendations of the manufacturers or
suppliers, OSHA/NIOSH, and occupational and trade
associations.Water should be used for dust
suppression when wet cutting is feasible. When the
hazards from inhalation of dust, mists and fumes cannot
be eliminated, the operator and any bystanders should
always wear a respirator approved by NIOSH/MSHA for
the materials being used.
MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15) — PAGE 3
TABLE OF CONTENTS
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MC12PH CONCRETE
MIXER
Fuel And Chemical Exposure Warnings .................. 2
Silicosis/Respiratory Warnings ................................ 3
Table Of Contents .................................................... 4
Training Checklist .................................................... 5
Safety Information .............................................. 6-11
Specifications/Dimensions ..................................... 12
Engine Specifications ............................................ 13
General Information ............................................... 14
Basic Components ................................................ 15
Engine Components .............................................. 16
Towing Guidelines ................................................. 17
Safety Chain Connection ....................................... 18
Inspection ......................................................... 19-20
Start-Up ................................................................. 21
Start-Up/Operation ................................................ 22
Operation ............................................................... 23
Maintenance (Engine) ...................................... 24-29
Troubleshooting ................................................ 30-31
Explanation Of Code In Remarks Column............. 32
Suggested Spare Parts ......................................... 33
Component Drawings
Honda GX340UT2QA2/QAP2
Gasoline Engines
Recoil Starter Assembly ................................... 46-47
Fan Cover Assembly......................................... 48-49
Carburetor Assembly ........................................ 50-51
Air Cleaner Assembly ....................................... 52-53
Muffler Assembly .............................................. 54-55
Fuel Tank Assembly .......................................... 56-57
Flywheel Assembly ........................................... 58-59
Cylinder Head Assembly. .................................. 60-61
Ignition Coil Assembly ...................................... 62-63
Control Assembly ............................................. 64-65
Cylinder Barrel Assembly. ................................. 66-67
Crankcase Cover Assembly ............................. 68-69
Crankshaft Assembly ........................................ 70-71
Piston Assembly ............................................... 72-73
Camshaft Assembly .......................................... 74-75
Label Assembly ................................................ 76-77
Terms And Conditions Of Sale — Parts ................ 78
NOTICE
Specifications and part numbers are subject to change
without notice.
Nameplate And Decals Assembly .................... 34-35
Drum Assembly ................................................ 36-37
Frame Assembly ............................................... 38-39
Axle Assembly .................................................. 40-41
Cabinet Assembly ............................................. 42-43
Mounting Plate Assembly ................................. 44-45
PAGE 4 — MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15)
TRAINING CHECKLIST
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Training Checklist
No, Description OK? Date
1
2
3 Fuel system, refueling procedure.
4
5
6 Emergency stop procedures.
7 Machine transport and storage.
Read operation manual
completely.
Machine layout, location of
components, checking of engine
oil levels.
Operation of controls (machine
not running).
Safety controls, safety stop switch
operation.
MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15) — PAGE 5
SAFETY INFORMATION
Do not operate or service the equipment before reading
the entire manual. Safety precautions should be followed
at all times when operating this equipment.
Failure to read and understand the safety
messages and operating instructions could
result in injury to yourself and others.
SAFETY MESSAGES
The four safety messages shown below will inform you
about potential hazards that could injure you or others. The
safety messages specifi cally address the level of exposure
to the operator and are preceded by one of four words:
DANGER, WARNING, CAUTION
SAFETY SYMBOLS
Potential hazards associated with the operation of this
equipment will be referenced with hazard symbols which
may appear throughout this manual in conjunction with
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safety messages.
DANGER
Indicates a hazardous situation which, if not avoided,
WILL result in DEATH or SERIOUS INJURY.
WARNING
Indicates a hazardous situation which, if not avoided,
COULD result in DEATH or SERIOUS INJURY.
CAUTION
Indicates a hazardous situation which, if not avoided,
COULD result in MINOR or MODERATE INJURY.
or NOTICE.
Symbol Safety Hazard
Lethal exhaust gas hazards
Explosive fuel hazards
Burn hazards
Rotating parts hazards
NOTICE
Addresses practices not related to personal injury.
PAGE 6 — MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15)
GENERAL SAFETY
NOTICE
This equipment should only be operated by trained and
Whenever necessary, replace nameplate, operation and
Manufacturer does not assume responsibility for any
accident due to equipment modifi cations. Unauthorized
use accessories or attachments that are not
recommended by Multiquip for this equipment. Damage
keep
Also, know the phone numbers
fi re department.
This information will be invaluable in the case of an
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SAFETY INFORMATION
CAUTION
NEVER operate this equipment without proper protective
clothing, shatterproof glasses, respiratory protection,
hearing protection, steel-toed boots and other protective
devices required by the job or city and state regulations.
Avoid wearing jewelry or loose fi tting clothes that may
snag on the controls or moving parts as this can cause
serious injury.
NEVER operate this equipment when not
feeling well due to fatigue, illness or when
under medication.
NEVER operate this equipment under the
infl uence of drugs or alcohol.
ALWAYS clear the work area of any debris, tools, etc.
that would constitute a hazard while the equipment is
in operation.
ALWAYS check the equipment for loosened threads or
bolts before starting.
DO NOT use the equipment for any purpose other than
its intended purposes or applications.
qualifi ed personnel 18 years of age and older.
safety decals when they become diffi cult read.
equipment modifi cation will void all warranties.
NEVER
to the equipment and/or injury to user may result.
ALWAYS know the location of the nearest
fi re extinguisher.
ALWAYS know the location of the nearest
fi rst aid kit.
ALWAYS know the location of the nearest phone or
a phone on the job site.
of the nearest ambulance, doctor and
emergency.
MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15) — PAGE 7
SAFETY INFORMATION
MIXER SAFETY
ENGINE SAFETY (GASOLINE MODELS ONLY)
Engine fuel exhaust gases contain poisonous carbon
monoxide. This gas is colorless and odorless, and can
The engine of this equipment requires an adequate
operate this equipment
place hands or fingers inside engine
operate the engine with heat shields or
while the engine is hot. Hot oil will gush out of the oil
tank and severely scald any persons in the general area
Make certain the operator knows how to and is capable
run engine without an air fi lter or with a dirty air
fi lter. Severe engine damage may occur. Service air fi lter
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DANGER
NEVER operate the equipment in an explosive
atmosphere or near combustible materials. An
explosion or fi re could result causing severe
bodily harm or even death.
DO NOT mix fl ammable or explosive substances.
WARNING
NEVER place your hands inside the drum
while starting or operating this equipment.
NEVER disconnect any emergency
or safety devices. These devices are
intended for operator safety. Disconnection of these
devices can cause severe injury, bodily harm or even
death. Disconnection of any of these devices will void
all warranties.
Before operating mixer, ensure that safety grate is in
position and correctly fi tted.
CAUTION
NEVER lubricate components or attempt service on a
running machine.
NOTICE
DANGER
cause death if inhaled.
free fl ow of cooling air. NEVER
in any enclosed or narrow
area where free fl ow of the
air is restricted. If the air
fl ow is restricted it will cause
injury to people and property
and serious damage to the
equipment or engine.
WARNING
DO NOT
compartment when engine is running.
NEVER
guards removed.
Keep fi ngers, hands hair and clothing away
from all moving parts to prevent injury.
DO NOT remove the engine oil drain plug
DANGEROUS
GAS FUMES
ALWAYS keep the machine in proper running condition.
ALWAYS ensure mixer is on level ground before mixing.
Fix damage to machine and replace any broken parts
immediately.
DO NOT tip mixer onto drum mouth when the drum is
rotating.
Ensure the drum is rotating while fi lling and emptying
the drum.
ALWAYS store equipment properly when it is not being
used. Equipment should be stored in a clean, dry location
out of the reach of children and unauthorized personnel.
PAGE 8 — MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15)
of the mixer.
CAUTION
NEVER touch the hot exhaust manifold,
muffl er or cylinder. Allow these parts to cool
before servicing equipment.
of turning the engine OFF in case of an emergency.
NOTICE
NEVER
frequently to prevent engine malfunction.
NEVER tamper with the factory settings
of the engine or engine governor. Damage
to the engine or equipment can result
if operating in speed ranges above the
maximum allowable.
SAFETY INFORMATION
FUEL SAFETY (GASOLINE MODELS ONLY)
GENERATOR SAFETY
If using a generator to power mixer, refer to
applicable generator manual safety information
section.
ELECTRIC MOTOR SAFETY
(ELECTRIC MODELS ONLY)
Power Cord/Cable Safety
cables or cords when
connecting equipment to generator. Inspect for cuts in
Make sure power cables are securely connected.
Incorrect connections may cause electrical shock and
Ensure that cables and cords will not be tripped over or
make certain that proper power or extension
allow any person or animal to stand underneath
make sure forklift forks are inserted into pockets
Tighten fuel tank cap securely and close fuel cock to
tie down equipment during transport by
tip the engine to extreme angles during lifting as
it may cause oil to gravitate into the cylinder head, making
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DANGER
DO NOT start the engine near spilled fuel or combustible
fl uids. Fuel is extremely fl ammable and its vapors can
cause an explosion if ignited.
ALWAYS refuel in a well-ventilated area, away from
sparks and open fl ames.
ALWAYS use extreme caution when working with
fl ammable liquids.
DO NOT fi ll the fuel tank while the engine is running
or hot.
DO NOT overfi ll tank, since spilled fuel could ignite if it
comes into contact with hot engine parts or sparks from
the ignition system.
Store fuel in appropriate containers, in well-ventilated
areas and away from sparks and fl ames.
NEVER use fuel as a cleaning agent.
DO NOT smoke around or near the
equipment. Fire or explosion could result
from fuel vapors or if fuel is spilled on a
hot engine.
DANGER
NEVER let power cords or cables lay in water.
NEVER use damaged or worn
the insulation.
NEVER grab or touch a live power
cord or cable with wet hands. The
possibility exists of electrical shock,
electrocution or death.
damage to the mixer.
CAUTION
trapped underneath the mixer.
NOTICE
ALWAYS
cord has been selected for the job.
TRANSPORTING SAFETY
CAUTION
NEVER
the equipment while lifting.
NOTICE
Operate electric motor only at the specifi ed voltage
indicated on the nameplate.
DO NOT spray water onto electric motor.
ALWAYS disconnect AC power plug from power source
before moving mixer.
ALWAYS make sure the ON/OFF switch
on the electric motor is in the OFF position
when not in use and before inserting the
mixer’s power plug into an AC receptacle.
MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15) — PAGE 9
NOTICE
ALWAYS
(if applicable) as far as possible when lifting the mixer.
ALWAYS shutdown engine before transporting.
NEVER lift the equipment while the engine is running.
prevent fuel from spilling.
DO NOT lift machine to unnecessary heights.
ALWAYS
securing the equipment with rope.
NEVER
the engine start diffi cult.
SAFETY INFORMATION
TOWING SAFETY
ENVIRONMENTAL SAFETY/DECOMMISSIONING
Decommissioning is a controlled process used to safely
retire a piece of equipment that is no longer serviceable.
If the equipment poses an unacceptable and unrepairable
safety risk due to wear or damage or is no longer cost
effective to maintain (beyond life-cycle reliability) and is to
be decommissioned (demolition and dismantlement),be
pour waste or oil directly onto the ground, down
When the life cycle of this equipment is over, remove
battery if equipped and bring to appropriate facility for
lead reclamation. Use safety precautions when handling
When the life cycle of this equipment is over, it is
recommended that the mixer frame and all other metal
Metal recycling involves the collection of metal from
discarded products and its transformation into raw
materials to use in manufacturing a new product.
Recyclers and manufacturers alike promote the process
of recycling metal. Using a metal recycling center
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CAUTION
Check with your local county or state safety towing
regulations, in addition to meeting Department of
Transportation (DOT) Safety Towing Regulations,
before towing your mixer.
In order to reduce the possibility of an accident while
transporting the mixer on public roads, ALWAYS make
sure the towing vehicle is mechanically sound and in
good operating condition.
ALWAYS shutdown engine before transporting.
ALWAYS inspect the hitch and coupling for wear. NEVER
tow a mixer with defective hitches, couplings, chains, etc.
Check the tire air pressure on both towing vehicle and
mixer Mixer tires should be infl ated to 50 psi cold. Also
check the tire tread wear on the vehicle and mixer.
ALWAYS make sure the mixer is equipped with a safety
chain.
ALWAYS properly attach mixer’s safety chains to towing
vehicle.
The maximum speed for highway towing is 55 MPH unless
posted otherwise. Recommended off-road towing is not to
exceed 15 MPH or less depending on type of terrain.
Avoid sudden stops and starts. This can cause skidding,
or jack-knifi ng. Smooth, gradual starts and stops will
improve towing.
Avoid sharp turns to prevent rolling.
Mixer should be adjusted to a level position at all times
when towing.
NOTICE
sure to follow rules below.
DO NOT
a drain or into any water source.
Contact your country's Department of
Public Works or recycling agency in your
area and arrange for proper disposal of
any electrical components, waste or oil
associated with this equipment.
batteries that contain sulfuric acid.
parts be sent to a recycling center.
promotes energy cost savings.
Raise and lock mixer wheel stand in up position when
towing.
Place chock blocks underneath wheel to prevent rolling
while parked.
PAGE 10 — MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15)
EMISSIONS INFORMATION
NOTICE
The gasoline engine used in this equipment has been
designed to reduce harmful levels of carbon monoxide
(CO), hydrocarbons (HC) and nitrogen oxides (NOx)
contained in gasoline exhaust emissions.
This engine has been certifi ed to meet US EPA Evaporative
emissions requirements in the installed confi guration.
Attempting to modify or make adjustments to the engine
emmission system by unauthorized personnel without
proper training could damage the equipment or create an
unsafe condition.
Additionally, modifying the fuel system may adversely affect
evaporative emissions, resulting in fi nes or other penalties.
Emission Control Label
The emission control label is an integral part of the emission
system and is strictly controlled by regulation(s).
The label must remain with the engine for its entire life.
If a replacement emission label is needed, please contact
your authorized engine distributor.
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SAFETY INFORMATION
MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15) — PAGE 11
SPECIFICATIONS/DIMENSIONS
A
OPTIONAL TOW BARS
HBC-1
2-INCH
BALL COUPLER
HLC-1
LOOP COUPLER
HPC-1
1-INCH
PIN COUPLER
B
C
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Figure 1. Dimensions
Table 1. MC12PH Concrete Mixer Specifications
Height (A) 67.5 in. (1,460.5 mm)
Width (B) 56 in. (1,422.4 mm)
Length (C) 83 in. (2,108.2 mm)
Maximum Mixing Capacity 12 cu. ft. (339.8 liters)
Drum Opening 20 in. (508 mm)
Bag Capacity
Weight
PAGE 12 — MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15)
1.5 ~ 2 bags
1,000 lbs. (543.59 Kg)
ENGINE SPECIFICATIONS
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Table 2. MC12PH Noise
Model MC12PH
Guaranteed ISO 11201:2010 Based
Sound Pressure Level at Operator Station in dB(A)
NOTES:
1. Sound Pressure and Power Levels are “A” weighted Measures per ISO 226:2003 (ANSI S1.4-1981). They are measured with the operating
condition of the machine which generates the most repeatable but highest values of the sound levels. Under normal circumstances, the sound
level will vary depending on the condition of the material being worked upon..
TBD
Table 3. Engine Specifications/Dimensions
Model GX340UT2QA2/GX340UT2QAP2
Type
Bore X Stroke 3.2 in. X 2.5 in. (88 mm x 64 mm)
Displacement 389 cm
Max. Output 10.7 H.P. (7.9 kW) @ 3600 RPM
Continuous Rated Power
Max. Net Torque 26.4 Nm/2.69 kgfm/2,500 rpm
Ignition System Digital CDI with variable ignition timing
Fuel Tank Capacity 1.61 U.S. Gallons (Approx. 6.1 Liters)
Fuel Unleaded Gasoline
Lube Oil Capacity 1.06 qt. (1.1 liters)
Oil Type
Speed Control Method Centrifugal Flyweight Type
Cooling System Forced Air
Starting Method Recoil Start
Spark Plug Type BPR6ES NGK
Spark Plug Gap 0.028-0.031 in. (0.70 - 0.80 mm)
Dimension (L x W x H)
Dry Net Weight 69.9 lbs (31.7 Kg.)
Air cooled 4-stroke OHV petrol engine, 25° inclined
cylinder, horizontal shaft, cast iron sleeve
3
5.6 kW (7.5 HP)/3,000 rpm
6.3 kW (8.4 HP)/3,600 rpm
4-Stroke API, SF or SG
SAE 10W-30 General Use
16.0 x 18.1 X 17.6 in.
(406 X 460 X 448 mm)
MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15) — PAGE 13
APPLICATION
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This mixer is intended only for the production of concrete.
The mixer must be used for its intended purpose and is
not suitable for the mixing of flammable or explosive
substances. The mixer must not be used in an explosive
atmosphere.
POWER PLANTS
The Multiquip MC12PH mixer is powered by a 10.7 HP,
air-cooled, 4-stroke gasoline engine. Refer to Table 3 to
for specific engine.
HARDWARE
Check all hardware on the mixer before starting. Periodically
inspect all hardware. Loose hardware can contribute
to early component failure and poor performance. Use
Table 4 as general guideline when the torqueing of mixer
hardware is required. Remember to keep all mixer hardware
components tight.
GENERAL INFORMATION
Table 4. Hardware Torque Recommendations
Hardware Diameter Torque (ft-lbs)
5/16-inch x 18 14
3/8-inch x 16 24
3/8-inch x 24 37
1/2-inch x 13 39
1/2-inch x 13 (Grade 8) 90
ENGINE MAINTENANCE
For basic engine maintenance, refer to the engine
maintenance section in this manual. For more detailed
engine maintenance, refer to the Honda Engine Owner's
manual furnished with the engine.
PAGE 14 — MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15)
Figure 2. Mixer Major Components
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BASIC COMPONENTS
1
12
2
3
10
1
4
5
6
1. Plastic Mixing Drum — The Multiquip MC12PH uses
a 12 cu. ft plastic mixing drum. This drum is to be used
for mixing of concrete. Always clean the drum after
each use. DO NOT use this mixing drum for the mixing
of volatile or hot liquids.
2. Dump Latch — To rotate the mixing drum, this latch
must be in the up position. To lock the drum, place the
latch in the down position.
11
9
7
8
NOTE:
SHOWN FOR CLARITY
1
ACTUAL LOCATION IS ON OPPOSITE SIDE
7. Cantilever Suspension — This mixer uses a cantilever
type suspension. Check the mounting hardware for
bolt hole elongation and tightness. See maintenance
section of this manual for recommended maintenance.
8. Chock Blocks — Place these blocks (not included as
part of the mixer package) under each mixer wheel
to prevent rolling, when mixer is not connected to the
towing vehicle.
3. Dump Gear Guard — NEVER operate the mixer
with this guard removed. Its purpose is to prevent dirt
and debris from entering the dump gear. In addition
operator clothing could become entangled in the dump
gear, causing severe injury and bodily harm.
4. Handwheel — Turn this wheel clockwise or
counterclockwise to rotate the mixing drum. Remember
the dump latch must be in the up position in order for
the mixing drum to be rotated.
5. Safety Chain — This mixer uses a 3/16-inch thick, 72
inches long zinc-plated saftey chain. ALWAYS connect
the safety chain when towing.
9. Tires Ply — The tire ply (layers) number is rated in
letters. This mixer uses 13-inch 2-ply tires. Replace
with only recommended type tires.
10. ON/OFF Switch — This switch is located on the side
of the mixer frame. When activated it will shut down the
engine. Pull out when starting the engine.
11. Cabinet/Latch — Encloses engine and electric motor.
NEVER run mixer with cabinet removed. Use latches
to secure engine compartment cabinet.
12. Mixing Blades — Used for the mixing of concrete.
When blades show signs of wear, replace the blades.
6. Tow Bar — This mixer uses various towing bars, please
reference the frame assembly drawing and parts list
in this manual to determine which tow bar meets your
requirements.
MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15) — PAGE 15
INITIAL SERVICING
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ENGINE COMPONENTS
Figure 3. Engine Components
The engine (Figure 3) must be checked for proper
lubrication and filled with fuel prior to operation. Refer to the
manufacturer's engine manual for instructions and details
of operation and servicing.
1. Fuel Filler Cap – Remove this cap to add unleaded
gasoline to the fuel tank. Make sure cap is tightened
securely. DO NOT over fill.
DANGER
Add fuel to the tank only when the engine
is stopped and has had an opportunity to
cool down. In the event of a fuel spill, DO
NOT attempt to start the engine until the
fuel residue has been completely wiped up
and the area surrounding the engine is dry.
2. Throttle Lever – Used to adjust engine RPM speed.
This lever is connect to the throttle lever cable located
on the handle bars. Reference throttle cable installation
procedure in this manual.
3. Recoil Starter (pull rope) – Manual-starting method.
Pull the starter grip until resistance is felt, then pull
briskly and smoothly.
4. Fuel Valve Lever – OPEN to let fuel flow, CLOSE to
stop the flow of fuel.
5. Choke Lever – Used in the starting of a cold engine,
or in cold weather conditions. The choke enriches the
fuel mixture.
6. Air Cleaner – Prevents dirt and other debris from
entering the fuel system. Remove wing-nut on top of
air filter canister to gain access to filter element.
NOTICE
Operating the engine without an air filter, with a
damaged air filter, or a filter in need of replacement
will allow dirt to enter the engine, causing rapid engine
wear.
7. Spark Plug – Provides spark to the ignition system.
Set spark plug gap according to engine manufacturer's
instructions. Clean spark plug once a week.
8. Muffler – Used to reduce noise and emissions. NEVER
touch when hot!
9. Fuel Tank – Fill with unleaded gasoline. Refer to Table 3
for fuel tank capacity. For additional information refer
to Honda engine owner's manual.
10. Dipstick/Oil Filler Cap – Remove this cap to determine
if the engine oil is low. Add oil through this filler port as
recommended in Table 5.
11. Oil Drain Plug – Remove this plug to remove oil from
the engine's crankcase.
12. Engine ON/OFF Switch – ON position permits engine
starting, OFF position stops engine operation.
PAGE 16 — MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15)
TOWING GUIDELINES
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TOWING SAFETY PRECAUTIONS
CAUTION
Check with your county or state safety towing
regulations department before towing your
mixer.
To reduce the possibility of an accident while
transporting the mixer on public roads, always make
sure that the mixer towing components and the towing
vehicle are in good operating condition and both units
are mechanically sound.
The following list of suggestions should be used when
towing the mixer:
Make sure that the hitch and coupling of the towing
vehicle are rated equal to, or greater than the trailer
"gross vehicle weight rating" (GVWR).
ALWAYS inspect the hitch and coupling for wear. NEVER
tow the mixer with defective hitches, couplings, chains
etc.
CHECK the tire air pressure on both the towing vehicle
and the trailer. Also check the tire tread wear on both
vehicles.
ALWAYS make sure the mixer is equipped with a "Safety
Chain."
ALWAYS attach trailer's safety chain to the frame of
towing vehicle.
ALWAYS make sure that the towing vehicle's directional,
backup, and brake lights are working properly.
Remember in most cases the maximum speed unless
otherwise posted for highway towing is 45 MPH, however
before towing your mixer, check your local state, and
county vehicle towing requirements. Recommended offroad towing is not to exceed 10 MPH or less depending
on type of terrain.
Place chocked blocks underneath wheels to prevent
rolling
vehicle.
Inflate tires to correct pressure, inspect tires for cuts, and
excessive wear. See Table 16 (Tire Wear Troubleshooting).
When towing of the mixer is required, place the drum in
the up position (mouth facing upwards).
, while parked, if disconnected from towing
ALWAYS make sure that the fuel valve lever is in the
OFF position (gasoline models only).
Check wheel mounting lug nuts with a torque wrench.
Torque wheel lug nuts as described in the maintenance
section of this manual.
Check tightness of U-clamp nuts, torque suspension
hardware as referenced in the maintenance section of
this manual.
Avoid sudden stops and starts. This can cause skidding,
or jackknifing. Smooth, gradual starts and stops will
improve gas milage.
Avoid sharp turns to prevent rolling.
CAUTION
If the mixer tow bar is deformed or damaged replace
entire tow bar. NEVER tow the mixer with a defective
tow bar. There exist the possibility of the trailer
separating from the towing vehicle.
TOW BAR TO VEHICLE (COUPLER ONLY)
1. Check the vehicle hitch ball, and mixer's coupler for
signs of wear or damage. Replace any parts that are
worn or damaged before towing.
2. Use only a 2-inch ball diameter (towing vehicle), this will
match the mixer's 2-inch coupler. Use of any other ball
diameter will create an extremely dangerous condition
which can result in separation of the coupler and ball
or ball failure.
3. After tow bar has been connected to mixer (see next
page), attach mixer's coupler to the hitch ball on the
towing vehicle securely and make sure the lock lever
is in the down position (locked).
MIXER TOW BAR VEHICLE (PINTLE AND LOOP)
1. Make sure the bumper on the towing vehicle is
equipped to handle either a pintle or loop type tow
bar configuration.
2. After tow bar has been connected to mixer (see next
page), secure either type of tow bar to the towing
vehicle, following state and county towing regulations
3. As a minimum, use a 1/2-inch bolt and nylock nut grade
5 when securing either tow bar to the towing vehicle.
MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15) — PAGE 17
TOW BAR TO MIXER CONNECTION
Reference Figure A for the installation of the safety chain.
1.
Align the hole on the tow bar with the hole on the mixer
2. Route the safety chain through the holes just above
Extend the safety chain along the length of the tow bar,
looping it through the tow bar's connector link. Remove
Connect the free end of (connector link) the safety
chain to the towing vehicle. Remember it is critical
that the length of the chain be properly adjusted, to
prevent the draw bar and the front of the mixer stand
from dropping to the the ground (contact) in the event
the draw bar becomes disconnected from the towing
SAFETY CHAIN CONNECTION
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CAUTION
NEVER tow the mixer with the safety chain removed.
The safety chain is intended to prevent complete
separation of the mixer from the towing vehicle in the
event of a tow bar failure.
Insert the tow bar through the round opening at the
bottom of the mixer stand.
frame, and insert 1/2-inch bolt through tow bar and
frame. Secure tow bar to frame with 1/2-inch nylock
nut. Tighten to 40 ft.-lbs.
the tow bar, located on each side of the mixer stand.
Loop the chain together and place under the tow bar.
Secure the loop with the connector link.
3.
any excess chain slack.
4.
vehicle.
CAUTION
DO NOT tow or lift the mixer unless the mixing drum
is completely empty.
Figure A. Tow Bar and Safety Chain Installation
CAUTION
Use a lifting device to lift tow bar onto vehicle coupler. If
lifting device is not available, have 2 persons of similar
height lift the tow bar. When lifting, do not attempt to lift
by bending forward. Bend hips and knees to squat down
to your load, keep it close to your body, and straighten
your legs to lift.
PAGE 18 — MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15)
UPPER LIMIT
LOWER LIMIT
INSPECTION
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BEFORE STARTING
1. Read all safety instructions at the beginning of manual.
2. Clean the unit, removing dirt and dust, particularly the
engine cooling air inlet, carburetor and air cleaner.
3. Check the air filter for dirt and dust. If air filter is dirty,
replace air filter with a new one as required.
4. Check carburetor for external dirt and dust. Clean with
dry compressed air.
5. Check fastening nuts and bolts for tightness.
CAUTION
ALWAYS wear approved eye and hearing
protection while operating the mixer.
CAUTION
NEVER place hands or feet inside the
engine guard cover while the engine is
running. ALWAYS shut the engine down
before performing any kind of maintenance
service on the mixer.
5. I
NOTICE
Reference engine manufacturer’s manual for specific
servicing instructions.
Figure 5. Engine Oil Dipstick (Oil Level)
Table 5. Oil Type
Season Temperature Oil Type
Summer 25°C or Higher SAE 10W-30
Spring/Fall 25°C ~ 10°C SAE 10W-30/20
Winter 0°C or Lower SAE 10W-10
FUEL CHECK
DANGER
ENGINE OIL CHECK
1. To check the engine oil level, place the unit on secure
level ground with the engine stopped.
2. Remove the filler dipstick from the engine oil filler hole
(Figure 4) and wipe it clean.
Figure 4. Engine Oil Dipstick (Removal)
3. Insert and remove the dipstick without screwing it into
the filler neck. Check the oil level shown on the dipstick.
4. If the oil level is low (Figure 5), fill to the edge of the
oil filler hole with the recommended oil type (Table 5).
Maximum oil capacity is 2.33 pints (1.09 liters).
Motor fuels are highly flammable and can be
dangerous if mishandled. DO NOT smoke
while refueling. DO NOT attempt to refuel the
mixer if the engine is hot or running.
1. Remove the gasoline cap located on top of fuel tank.
2. Visually inspect to see if fuel level is low. If fuel is low,
replenish with unleaded fuel.
3. When refueling, be sure to use a strainer for filtration.
DO NOT top-off fuel. Wipe up any spilled fuel
immediately.
BLADE CHECK
Check for worn blades.
If using a plastic drum, replace the blades using the part
numbers referenced in the parts section of this manual.
MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15) — PAGE 19
V-BELT CHECK
OIL SOAKED
MISSING RUBBER
PULL OUT
TO STOP ENGINE
Discount-Equipment.com
Visually examine the V-belt (Figure 6) and determine if it
is full of tiny cracks, frayed, has pieces of rubber missing,
is peeling or otherwise damaged.
Also, examine the belt and determine if it is oil soaked or
"glazed " (hard shiny appearance on the sides of the belt).
Either of these two conditions can cause the belt to run hot,
which can weaken it and increase the danger of it breaking.
If the V-belt exhibits any of the above wear conditions
replace the V-belt immediately.
INSPECTION
GLAZED
CRACKS
SIDEWALL
WEAR
Figure 6. V-Belt Inspection
CORD FAILURE
WORN BACK
COVER
BROKEN
START/STOP SWITCH
This unit has been equipped with a start/stop switch
(Figure 7), which should be tested every time the unit is
started.
TO START ENGINE
START/STOP
SWITCH
PAGE 20 — MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15)
PUSH IN
Figure 7. Start/Stop Switch
START-UP
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This section is intended to assist the operator with the initial
start-up of the unit. It is extremely important that
this section be read carefully before attempting
to use the mixer in the field. DO NOT use your
mixer until this section is thoroughly understood.
WARNING
Failure to understand the operation of the mixer could
result in severe damage to the mixer or personal injury.
Reference Figure 2 for the location of any components
referenced in this manual.
CAUTION
NEVER operate the mixer in a confined
area or enclosed area structure that does
not provide ample free flow of air.
The following steps outline the procedure for starting the
engine.
1. Move the fuel shut-off lever (Figure 8) to the ON
position.
3. Move the throttle lever (Figure 10) away from the slow
position, about 1/3 of the way toward the fast position.
Figure 10. Throttle Lever
4. Turn the engine switch (Figure 11) to the ON position.
Figure 8. Fuel Shut-Off Lever
2. To start a cold engine, move the choke lever (Figure
9) to the CLOSED position.
Figure 11. Engine On/Off Switch
5. Located at the rear of the mixer frame is the main
start/ stop button (Figure 12). Pull this button outward
to start the engine.
PULL OUT
TO START ENGINE
START/STOP
SWITCH
Figure 12. Engine Start/Stop Button
Figure 9. Choke Lever
MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15) — PAGE 21
START-UP/OPERATION
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6. Pull the starter grip (Figure 13) lightly until you feel
resistance, then pull briskly. Return the starter grip
gently.
Figure 13. Starter Grip
OPERATION
1. To position the drum, make sure the mixer is placed
on firm level ground, then pull up on the dump latch
(Figure 14) and turn the hand wheel until the drum is
at the desired position. Once the drum is at the desired
position, pull down on the dump latch to lock the drum
in position.
CAUTION
NEVER stand in front or behind the mixing
drum while it is being placed in the dump
position. Stay clear of the mixing drum
while it is being positioned.
2. As the drum rotates, use a shovel (Figure 15) to place
the cement mix inside the drum, add water as required.
Be careful to only place the tip of the shovel inside
the drum.
Figure 15. Filling Mix Drum
Figure 14. Mixing Drum Positioning
PAGE 22 — MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15)
OPERATION
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3. Placing the shovel all the way inside the drum
(Figure 16) will cause the shovel to strike the blades.
This condition will make the shovel rotate, and could
cause injury to personnel. NEVER place hands inside
the mixing drum while it is rotating.
STOPPING THE MIXER
1. Push the main start/stop switch (Figure 17) inward to
stop the engine.
START/STOP
SWITCH
PUSH IN
TO STOP ENGINE
Figure 17. Start/Stop Button (Stop Position)
2. Place fuel shut-off lever in the OFF position.
3. Clean drum of all debris and foreign matter.
Figure 16. Filling Mixing Drum
MC12PH CONCRETE MIXER • OPERATION AND PARTS MANUAL — REV. #1 (09/02/15) — PAGE 23
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